This is an issue, that I myself never encountered. Many thanks to you for the report.
With the new versions, beginning with 20220508.1, we started the transformation to more modern HTML (former known as HTML5). This process started with the definition of the change of the document type definition and the meta element, that gives the forum a better scalability. From version to version we are working not only on bugfixes and features but also on the further transformation of the default theme.
Yes, there are many problems to solve. The changes from version to version affects typically a predefined section. As first I altered the page header, then the general structure of the pages main section but I've not dug very deep into the thousands of views, linke for example the posting form. I'll have a look into the issue.
Trenne niemals Müll, denn er hat nur eine Silbe!