Another critical issue with #PPL: RSP-11267 "TTask.Wait() does not wait canceled TTask's handler to fully complete"

Another critical issue with #PPL: RSP-11267 "TTask.Wait() does not wait canceled TTask's handler to fully complete"

Can anyone suggest a workaround which does not imply modifying System.Threading unit?

Please vote for RSP-11267 at https://quality.embarcadero.com/browse/RSP-11267 

I hope Marco Cantù and Allen Bauer  will pay attention to this issue.
https://quality.embarcadero.com/browse/RSP-11267