Problem after removing WordPress trailing slash

Dear developer,

When I had slash at the end of each permalink, before this plugin was working fine for me. It was serving in static mode.
And, this header set was not available ‘X-Cache-Handle php’

But, as I removed trailing slash from WordPress permalink settings and I set 301 redirection, after then the advanced Apache configuration code is not working. Still, I can see that in header response it is showing that Cache is handled via PHP (example)
It is very strange for me.

Below are the code, which I am using. Please have a look

# BEGIN Cache Enabler
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /

# set blog sub path
SetEnvIf Request_URI "^(.*)$" SUB_PATH=/wp-content/cache/cache-enabler/

# set Cache Enabler path
SetEnvIf Request_URI "^(.*)$" CE_PATH=$1
SetEnvIf Request_URI "^(/)index.php$" CE_PATH=$1

<IfModule mod_mime.c>
# webp HTML file
RewriteCond %{ENV:CE_PATH} /$
RewriteCond %{ENV:CE_PATH} !^/wp-admin/.*
RewriteCond %{REQUEST_METHOD} !=POST
RewriteCond %{QUERY_STRING} =""
RewriteCond %{HTTP_COOKIE} !(wp-postpass|wordpress_logged_in|comment_author)_
RewriteCond %{HTTP:Accept-Encoding} gzip
RewriteCond %{HTTP:Accept} image/webp
RewriteCond %{DOCUMENT_ROOT}%{ENV:SUB_PATH}%{HTTP_HOST}%{ENV:CE_PATH}index-webp.html.gz -f
RewriteRule ^(.*) %{ENV:SUB_PATH}%{HTTP_HOST}%{ENV:CE_PATH}index-webp.html.gz [L]

# gzip HTML file
RewriteCond %{ENV:CE_PATH} /$
RewriteCond %{ENV:CE_PATH} !^/wp-admin/.*
RewriteCond %{REQUEST_METHOD} !=POST
RewriteCond %{QUERY_STRING} =""
RewriteCond %{HTTP_COOKIE} !(wp-postpass|wordpress_logged_in|comment_author)_
RewriteCond %{HTTP:Accept-Encoding} gzip
RewriteCond %{DOCUMENT_ROOT}%{ENV:SUB_PATH}%{HTTP_HOST}%{ENV:CE_PATH}index.html.gz -f
RewriteRule ^(.*) %{ENV:SUB_PATH}%{HTTP_HOST}%{ENV:CE_PATH}index.html.gz [L]

AddType text/html .gz
AddEncoding gzip .gz
</IfModule>

# webp HTML file
RewriteCond %{ENV:CE_PATH} /$
RewriteCond %{ENV:CE_PATH} !^/wp-admin/.*
RewriteCond %{REQUEST_METHOD} !=POST
RewriteCond %{QUERY_STRING} =""
RewriteCond %{HTTP_COOKIE} !(wp-postpass|wordpress_logged_in|comment_author)_
RewriteCond %{HTTP:Accept} image/webp
RewriteCond %{DOCUMENT_ROOT}%{ENV:SUB_PATH}%{HTTP_HOST}%{ENV:CE_PATH}index-webp.html -f
RewriteRule ^(.*) %{ENV:SUB_PATH}%{HTTP_HOST}%{ENV:CE_PATH}index-webp.html [L]

# default HTML file
RewriteCond %{ENV:CE_PATH} /$
RewriteCond %{ENV:CE_PATH} !^/wp-admin/.*
RewriteCond %{REQUEST_METHOD} !=POST
RewriteCond %{QUERY_STRING} =""
RewriteCond %{HTTP_COOKIE} !(wp-postpass|wordpress_logged_in|comment_author)_
RewriteCond %{DOCUMENT_ROOT}%{ENV:SUB_PATH}%{HTTP_HOST}%{ENV:CE_PATH}index.html -f
RewriteRule ^(.*) %{ENV:SUB_PATH}%{HTTP_HOST}%{ENV:CE_PATH}index.html [L]

# wp override
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [END]
</IfModule>
# BEGIN WordPress
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /
    RewriteRule ^index\.php$ - [L]
    RewriteRule (.+)/$ $1 [R=301,L]
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule . /index.php [L]
</IfModule>

Thanks & regards,
Gulshan

https://ww.wp.xz.cn/plugins/cache-enabler/