On the Deployment page, the console will show the value 1 if either maxUnavailable or maxSurge is set to 0. These fields are allowed to be set to 0 (as long as they're not both 0). We should only show the default value as 1 if the fields are missing from the resource YAML.
*** Bug 1891820 has been marked as a duplicate of this bug. ***
Tested against pr7083, create deployment in project, when set either maxUnavailable or maxSurge to 0, it will show 0 now. The bug is fixed.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Moderate: OpenShift Container Platform 4.7.0 security, bug fix, and enhancement update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2020:5633