I checked........rule change 2018
Apr 10, 2018 · Starting in 2018, when a team scores a winning touchdown with no time left in regulation, the team will not be compelled to attempt an extra point or a 2-point conversion, according to the rule ...
this rule was changed in 2018, only applies if the extra point does not change the outcome of the game, if it does not, then no attempt
The rule was made for teams that win and storm the field or run off to the locker room but as it is written should not apply to teams that are down. Oh well, Bears probably opted out? Nagy and Trubisky are both gone in the off-season.