Clone Error (strips necessary backslashes)

  • On our site running WordPress 5.8.1 we use blocks that may contain attributes with double dashes (i. e. button--outline). WordPress escapes these to \u002d\u002d. Upon cloning a page containing these blocks with the latest plugin version 3.1.16 the generated/cloned markup is missing the \ in these attributes which in turn crash the complete editor with a JS error. Also refer to the example below:

    Original code, generated by the blocks save function:

    <!-- wp:frutiger/colored-background {"backgroundClass":"u-background\u002d\u002dsecondary"} -->
<div class="u-background--bleed u-background--secondary"><!-- wp:frutiger/two-columns {"layoutType":"5-2-5"} -->

    Same code of the cloned post (retrieved from the database):

    <!-- wp:frutiger/colored-background {"backgroundClass":"u-backgroundu002du002dsecondary"} -->
<div class="u-background--bleed u-background--secondary"><!-- wp:frutiger/two-columns {"layoutType":"5-2-5"} -->

    I have not observed this erronous behaviour in older core versions and have found this possibly related core ticket.

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