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Custom Field doesn’t work with bbpress 2.6 and above
I use custom fields for bbpress topics.
I tried to turn off all plugins and change the theme to default but always receive next javascript error in the console:

load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,suggest,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse&ver=5.3.1:4 POST https://test.3d-kstudio.com/wp-admin/admin-ajax.php 400
send @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,suggest,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse&ver=5.3.1:4
ajax @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,suggest,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse&ver=5.3.1:4
ajaxAdd @ load-scripts.php?c=0&load[chunk_0]=hoverIntent,common,hoverintent-js,admin-bar,wp-ajax-response,jquery-color,wp-lists,jquery-ui-sortable,postbox,jquery-ui-position&load[chunk_1]=,jquery-ui-menu,jquery-ui-autocomplete,tags-suggest,tags-box,word-count,wp-sanitize,post,editor-expand,thickbox,shortcode,backbo&load[chunk_2]=ne,wp-util,wp-backbone,media-models,wp-plupload&ver=5.3.1:9
i.wpList.<computed> @ load-scripts.php?c=0&load[chunk_0]=hoverIntent,common,hoverintent-js,admin-bar,wp-ajax-response,jquery-color,wp-lists,jquery-ui-sortable,postbox,jquery-ui-position&load[chunk_1]=,jquery-ui-menu,jquery-ui-autocomplete,tags-suggest,tags-box,word-count,wp-sanitize,post,editor-expand,thickbox,shortcode,backbo&load[chunk_2]=ne,wp-util,wp-backbone,media-models,wp-plupload&ver=5.3.1:9
(anonymous) @ load-scripts.php?c=0&load[chunk_0]=hoverIntent,common,hoverintent-js,admin-bar,wp-ajax-response,jquery-color,wp-lists,jquery-ui-sortable,postbox,jquery-ui-position&load[chunk_1]=,jquery-ui-menu,jquery-ui-autocomplete,tags-suggest,tags-box,word-count,wp-sanitize,post,editor-expand,thickbox,shortcode,backbo&load[chunk_2]=ne,wp-util,wp-backbone,media-models,wp-plupload&ver=5.3.1:9
dispatch @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,suggest,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse&ver=5.3.1:3
r.handle @ load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,suggest,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse&ver=5.3.1:3

PS. For getting the error the topic must be saved.