As @alemabrahao indicated, it certainly seems to be a seen behaviour. It's feasible that the issue may be due to the following known issue: Link aggregates may take some time to be reinitialized when a switch stack failover occurs. During this time traffic traversing the link aggregate will be interrupted. From what I can tell, that known issue doesn't seem to be present in the 17.5.4 release notes, so it may be fixed there. However, I don't think anyone in the community has performed the testing to validate that.
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