In a not so recent match I experienced a clipping Issue of Abilities for the first time and it was devastating for the enemy team due to allowing me to clutch the round out (Clip not linkable due to Subreddit rules, will post it in comments though so only Comment gets deleted if this gets seen as not part of Bugreport). If you look closely on the Bind tube you can see the Phoenix hand clipping trough it. Now after a few Months I decided to Investigate that Issue and well I didnt even complete trying out every single Agent to gete to my conclusion: ALL Abilities clip walls.
Proof:

Astra in Astralform clipping

Some Breach Utility clipping the wall

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If you look closely you can see the Tip of Brimstone Molly clipping

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And Omen TP clipping VERY obvious

I think the solution to resolving this clipping Issue is coding the Abilities just like guns in terms of showing them due to guns not clipping trough:

I didnt test it out further than that because I think my point is made and Im 100% sure that there are more abilities that will Clip walls like that.
(These Clipps also worked on other maps from what I have seen I didnt test it though.