The index pattern of kibana is visible and disappears. (blinking)

Open Source Elasticsearch and Kibana
1

The index pattern of kibana is visible and disappears. It is also blinking, but in most cases, it is indicated to create a new index pattern.

I deleted all browser cache just in case, but it’s the same.
What could be the cause?

used docker-image :
amazon/opendistro-for-elasticsearch-kibana:1.13.0
amazon/opendistro-for-elasticsearch:1.13.0

2

The index pattern of kibana is invisible or disappears. (blinking)