[Hummingbird Pro] Error Log with Hummingbird Errors

Hello,
I have this error message related to Hummingbird on a sub-site of multi-site Mesadevelopmentalservices.org and it is an issue of concern for me. I have been told that they are just warnings but if I get them every day they will eventually be a HUGE error log – Is it normal for Hummingbird to throw errors?

[01-Jul-2021 14:31:36 UTC] PHP Warning: array_filter() expects parameter 1 to be array, string
given in
/var/web/site/public_html/wp-content/plugins/wp-hummingbird/core/modules/class-page-cache.p
hp on line 693
[01-Jul-2021 14:31:36 UTC] PHP Warning: array_filter() expects parameter 1 to be array, string
given in
/var/web/site/public_html/wp-content/plugins/wp-hummingbird/core/modules/class-page-cache.p
hp on line 726
[01-Jul-2021 14:31:36 UTC] PHP Warning: array_filter() expects parameter 1 to be array, string
given in
/var/web/site/public_html/wp-content/plugins/wp-hummingbird/core/modules/class-page-cache.p
hp on line 693
[01-Jul-2021 14:31:36 UTC] PHP Warning: array_filter() expects parameter 1 to be array, string
given in
/var/web/site/public_html/wp-content/plugins/wp-hummingbird/core/modules/class-page-cache.p
hp on line 726
[01-Jul-2021 14:31:48 UTC] PHP Warning: array_filter() expects parameter 1 to be array, string
given in
/var/web/site/public_html/wp-content/plugins/wp-hummingbird/core/modules/class-page-cache.p
hp on line 693
[01-Jul-2021 14:31:48 UTC] PHP Warning: array_filter() expects parameter 1 to be array, string
given in
/var/web/site/public_html/wp-content/plugins/wp-hummingbird/core/modules/class-page-cache.p
hp on line 726
[01-Jul-2021 14:31:48 UTC] PHP Warning: array_filter() expects parameter 1 to be array, string
given in
/var/web/site/public_html/wp-content/plugins/wp-hummingbird/core/modules/class-page-cache.p
hp on line 873