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:
after saving it and refreshing field it is changed to
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.