I am specifically having an issue with table borders not rendering, but it looks like cell padding is also not working so there may be others as well.

In 'Read' mode, when I Inspect a table element in my browser, I see it is using the outdated HTML syntax
<table border="1">

instead of the modern syntax

<table style="border-width: 1px">

I don't know if this is root cause of the problem, but might be related.

I've reproduced the issue in Chrome (Windows 11 and Android), Microsoft Edge (W11), and Firefox(W11)

1) Create a new Text page in a manuscript

2) Insert a table of any size and populate elements (which defaults to a 1px border)

3) Toggle "Read" mode

Expected Result: Table will not render any borders

4) Use the browser's Inspect tool to inspect the table element

Expected Result: Table HTML uses old syntax
<table style="<other settings>" border="1">

5) In the inspect tool, edit the table element to

<table style="<other settings>; border-width: 1px;">

Expected Result:
Table border renders correctly