There are about five different "opposition" (anti-government) 'sides' in Syria, with varying degrees of positional allegiance from "radical Islamic" to pretty much (as much as it is realistically possible, at least) plain old secular anti-Assad. With a side-diversions into an ethnic group that is downright considered 'Unislamic' by some of their detractors, which unfortunately includes at least two of the other "opposition"s. (Last I checked, these contrary groups didn't have adjacent territories in the patchwork quilt of government/non-government control, however.) And sub-militias have been known to switch between SDF/SFA/IF 'umbrellas' according to which is territorially the more relevent to their own concerns.
Syria is just so very complicated, and even if it's specifically the full-blown Islamic faction (basically Islamic State), given that they're fighting that government which is being supported by Russia, I'm not sure I'd blame at least some people thinking "the enemy of my enemy's friend is my friend" and giving a helpful nudge to keep Russian forces having to spend extra effort. Even if not to cause them a more direct headache.
And all the "well known secrets" are probably well out of Pandora's Box, anyway. Even if not officially sanctioned, and even if not unofficially sanctioned by a fringe element of a slightly rogue sub-department, eventually someone with access to the early R&D will have gabbed to their Syrian cousin (or via an even more tortuous and disconnected route) and proliferated some of the tricks and tips. And a good tactic is a good tactic, regardless of who actually independently thought it up (or plagiarised it, or was actively given plenty of directed hints about it).
...I wouldn't say that I don't have concerns. But you can't call me surprised that there's cross-pollination. Which makes random claims (I know nothing about Clash Report) of apparent trans-national cooperation possibly echo such inevabilities or be just a warped understanding of reality. Yeah, sounds possible. Other interpretations might be more true.