[Resolved] ypeError in WordPress 6.9 editor - wpml/navigation-language-switcher block

After updating to WordPress 6.9, the Gutenberg editor crashes with error:
TypeError: Cannot read properties of undefined (reading 'indexOf')

I identified the issue using browser console:
wp.blocks.getBlockTypes().filter(b => typeof b.description !== 'string')

Result: Block wpml/navigation-language-switcher has description as React element instead of string.

Environment:
- WordPress 6.9
- WPML 4.8.6
- Flatsome theme 3.20.4