The use of gamma color space results in over-bright results.

Reproduction Steps:
1. Open the scene in the attached project
2. Observe that the reflective object is massively over-saturated

This is a regression, as the same scene in 5.4 does not display any issues (see attached screenshot in comments, below).

Expected Result:
Gamma color space should provide the same results in 5.5 as it does in 5.4.

Reproduced in versions 5.5.0b3 (52385a4d4cc9) and 5.5.0b9 (32e48fde8b94).
NOT reproducible in version 5.5.0b2 (741887044bba).