Add known issues for Filebeat 8.14.0 (#41882)

CHANGELOG.asciidoc

@@ -7,6 +7,11 @@
 === Beats version 8.14.3
 https://github.com/elastic/beats/compare/v8.14.2\...v8.14.3[View commits]
 
+==== Known Issues
+
+*Filebeat*
+ - Filestream input will resend files that have been inactive for 30min or more. Workaround: set `clean_inactive` to a very high value, like 5 years: `clean_inactive: 43800h0m0s`. {issue}40178[40178]
+
 ==== Bugfixes
 
 *Filebeat*
@@ -37,6 +42,11 @@ https://github.com/elastic/beats/compare/v8.14.2\...v8.14.3[View commits]
 === Beats version 8.14.2
 https://github.com/elastic/beats/compare/v8.14.1\...v8.14.2[View commits]
 
+==== Known Issues
+
+*Filebeat*
+ - Filestream input will resend files that have been inactive for 30min or more. Workaround: set `clean_inactive` to a very high value, like 5 years: `clean_inactive: 43800h0m0s`. {issue}40178[40178]
+
 ==== Breaking changes
 
 *Filebeat*
@@ -73,6 +83,11 @@ https://github.com/elastic/beats/compare/v8.14.1\...v8.14.2[View commits]
 === Beats version 8.14.1
 https://github.com/elastic/beats/compare/v8.14.0\...v8.14.1[View commits]
 
+==== Known Issues
+
+*Filebeat*
+ - Filestream input will resend files that have been inactive for 30min or more. Workaround: set `clean_inactive` to a very high value, like 5 years: `clean_inactive: 43800h0m0s`. {issue}40178[40178]
+
 ==== Bugfixes
 
 *Heartbeat*
@@ -84,6 +99,11 @@ https://github.com/elastic/beats/compare/v8.14.0\...v8.14.1[View commits]
 === Beats version 8.14.0
 https://github.com/elastic/beats/compare/v8.13.4\...v8.14.0[View commits]
 
+==== Known Issues
+
+*Filebeat*
+ - Filestream input will resend files that have been inactive for 30min or more. Workaround: set `clean_inactive` to a very high value, like 5 years: `clean_inactive: 43800h0m0s`. {issue}40178[40178]
+
 ==== Breaking changes
 
 *Filebeat*