12.0-7T2 is an Early Deployment release. Besides it is fairly old.
ED Releases are not generally recognized for their stability.
Considering this I would advise you to check whether you absolutely need this version or some other ED. This may be the case if you are using a specific feature or hardware that is not supported in the GD-release. (For example the NM-1FE-2CE1-..) If you are not needing this, an upgrade to 12.0 (x) is advisable. 12.0 has reached GD status ages ago and if this problem is really due to a SW-bug it should be resolved. Alternatively you could upgrade to 12.1 but this is more likely to have impact on memory requirements.
If the problem is hardware related you can use this upgrade to eliminate software as a cause.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...