Replacing placeholder brackets in the href attribute to it encoding reference
I'm not sure if it is exactly a bug, but the problem happens only when we try to put placeholder inside href attribute, like:
<a href="{some.url}">something</a>
after saving it and refreshing field it is changed to
<a href="%7Bsome.url%7D">something</a>
It happens with Tiny when editor is disabled, with CodeMirror and completely disabled editor in Joomla.
There is no problem when I add same placeholder for example to class, style or alt attribute. I can also save it in the notification app configuration, or in the section description, there such problem doesn't appear. It only affect contact form field.
I can only save such value with Tiny editor when editor is enabled, by simply pasting this line and saving, however I think it should also work when editor is disabled or completely not used.