Hi Support.

Since upgrading to WP 5.5.1 I started to experience strange behaviour in the backend, whilst editing my portfolio.

Disabled all non-Colega plugins, same problem.

Then I saw this error (screenshot) in browser dev tools >>

Block validation: Block validation failed for `colega-gutenberg/slider` (Object).

Content generated by `save` function:

<div class="wp-block-colega-gutenberg-slider swiper-container content-slider disable-drag"><div class="swiper-wrapper"></div><div class="slider-button-next"></div><div class="slider-button-prev"></div></div>

Content retrieved from post body:

<div class="wp-block-colega-gutenberg-slider swiper-container content-slider disable-drag"><div class="swiper-wrapper">

Hi Support.

Good news! I have been working on the carousel block again today, and did not see this problem