PNG gAMA chunk is silently ignored

GIMP version: 2.10.8+om-0ubu18.04.3~ppa (and newer versions, see comments below)

Operating System: lubuntu 18.04

Package: Otto Meier otto@kesselgulasch.org PPA

Description of the bug

https://superuser.com/questions/579216/why-does-this-png-image-display-differently-in-chrome-firefox-than-in-safari-a
When I open that pear/apple image in GIMP, an apple is shown. GIMP does not ask whether or not it should ignore the 0.02 gamma value.

Reproduction

Is the bug reproducible? Always

Reproduction steps:

1. Open that image with GIMP

…

Expected result: Pear

Actual result: Apple