0.9.73 Update Causes CSS Errors

Since updating to the latest version I’m getting CSS errors. I’ve noticed that other people are experiencing CSS errors with 0.9.73 too. My error was pointed out in an email from Google Search Console today which said:

“Search Console has identified that your site is affected by 1 new Accelerated Mobile Pages related issue. This means that Accelerated Mobile Pages may be negatively affected in Google Search results. We encourage you to review and consider fixing this issue.

New issue found:

CSS syntax error in tag ‘style amp-custom’ – incomplete declaration.”

Please clarify if you are going to fix this with an update or if I should downgrade to the previous version.