Restricted units are accessible without completing prior unit

I have unit completion restrictions set up on my course. Prior to the latest update, I wasn't able to move on to the next unit even though I had completed the prior one. After the update, I can continue on to the next unit after I completed the first one, but now I can continue on to ANY unit, which I shouldn't be able to do.

I noticed in this threadthat someone else appears to be having a similar/same issue.

I have enabled Support access. The site that has my sample course is Sample PL.

Thank you in advance,
Caroline