"seems to be causing" is also an excellent alternative to "it looks like" that doesn't hinge on visual-sensory primacy, and tends to translate slightly less ambiguously across language-familiarity boundaries due to 'seems' having more precise meaning re: uncertainty than 'looks', 'feels', 'sounds'. Or you could abbreviate to "could be" / "may be" / "might be" (non-high certainty), "is probably" (high certainty) if that sort of nuance is your thing. Noteworthy point: it is neurotypical to treat "is" as 100% certain rather than 99.9% certain when someone says it confidently, but as 80% certain rather than 99.9% certain when someone says it uncertainly, based solely on non-verbal nuance; this can be infuriating and I tend to recommend saying "I am certain" at 99.9% in combination with courteous handling of the slight but eternal possibility of being wrong.
"Let me know how I can help" should not be taken for granted as a thing to be offered, though. Some teams have very strict divisions of labor. Some workers (especially anyone whose duties are 'monitor and report' rather than 'creatively solve') are not overtime-exempt and cannot volunteer their time. Some workers (especially anyone who's reached a high-capability tech position from the ground up) are flooded with opportunities to do less of their own job and more of everyone else's and must not preemptively offer their time to an open-ended offer of 'help'. A more focused phrase such as "Let me know if you have questions, need more evidence, etc." provides a layer of defense against that without implicitly denying assistance for help if requested.
"Thanks!" is one of the most mocked request-terminators I've seen in twenty years of business. It is widely abused as "have fun storming the castle, i'm out micdrop" rather than as a sincere expression of gratitude that contains any actual statement of why you're grateful. "Thank you for doing the job the company paid you to do" sounds ridiculous when you say it out loud, even to neurotypicals. Tell people thank you with more than one word if you mean it, and tell them what you're thanking them for, and consider thanking them for what they did rather than lobbing it like a grenade strapped to a problem. If you hand them a problem and they say "got it, I'll look into it", saying "Thanks." to that is completely fine; it serves the exact purpose of courtesy described, and also doubles as a positive-handoff "your plane" reply concluding the problem handoff, so that you can safely mark it as delegated, they can safely assume you didn't miss their message and are continuing to work it, etc.
"Let me know how I can help" should not be taken for granted as a thing to be offered, though. Some teams have very strict divisions of labor. Some workers (especially anyone whose duties are 'monitor and report' rather than 'creatively solve') are not overtime-exempt and cannot volunteer their time. Some workers (especially anyone who's reached a high-capability tech position from the ground up) are flooded with opportunities to do less of their own job and more of everyone else's and must not preemptively offer their time to an open-ended offer of 'help'. A more focused phrase such as "Let me know if you have questions, need more evidence, etc." provides a layer of defense against that without implicitly denying assistance for help if requested.
"Thanks!" is one of the most mocked request-terminators I've seen in twenty years of business. It is widely abused as "have fun storming the castle, i'm out micdrop" rather than as a sincere expression of gratitude that contains any actual statement of why you're grateful. "Thank you for doing the job the company paid you to do" sounds ridiculous when you say it out loud, even to neurotypicals. Tell people thank you with more than one word if you mean it, and tell them what you're thanking them for, and consider thanking them for what they did rather than lobbing it like a grenade strapped to a problem. If you hand them a problem and they say "got it, I'll look into it", saying "Thanks." to that is completely fine; it serves the exact purpose of courtesy described, and also doubles as a positive-handoff "your plane" reply concluding the problem handoff, so that you can safely mark it as delegated, they can safely assume you didn't miss their message and are continuing to work it, etc.