Toggled text inside a bold inset is output differently on master than 2.3.x

[Stephan Witt]

> Am 26.07.2022 um 21:19 schrieb Scott Kostyshak <skostysh at lyx.org>:
> 
> On Tue, Jul 26, 2022 at 04:31:13PM +0200, Daniel wrote:
>> On 2022-07-26 16:25, Scott Kostyshak wrote:
>>> See the attached example. The text "text part 2" is output as bold in 2.3.x, but is not output as bold in master (although it is displayed as bold in the LyX display).
>>> 
>>> I can bisect if it would be worth the time.
>>> 
>>> Scott
>> 
>> For some reason, I cannot open the attached document (neither 2.3 nor 2.4):
>> ".../mwe.23.lyx is not a readable LyX document".
> 
> Strange. I wonder if it's an encoding thing.
> 
> Scott

I have no problem to open it with LyX-2.3.6.1 MacOS version and with LyX-2.4.0dev.

I can confirm the different PDF output with TeX Live 2020.

Stephan