Re: Droideka shield whilst rolling - BUG
You mean this:

Which isn't only a shield while rolling, it's also the possibility of using a shield just after a previous shield has run off

But hey, It's July, a patch shall only come in August. This will be just like last July.
@ThePixel448 's triggering method is 100% accurate. It's really easy to reproduce. The person just needs to keep moving after the srpint, otherwise the droideka will leave ball form and deploy shield normally.