Reply To: Responsive Issue

I solved this issue (plus some others) on my side, by adding this CSS:
Hope this may help someone else….

input#bbp_search {
  margin: 0.25em 0.25em 0.25em 0.25em;
}
li.bbp-header {
  margin-top: 0px !important;
  margin-bottom: 2px !important;
  border: solid 0px red !important;
}
/* START -- Main Effect on Forum width on small devices */
ul.forum-titles li {
text-transform: uppercase !important;
  font-size: 12px !important;
}
li.bbp-forum-info, li.bbp-topic-title {
    width: 40%;
}
li.bbp-forum-topic-count, li.bbp-topic-voice-count, li.bbp-forum-reply-count, li.bbp-topic-reply-count {
    width: 15%;
}
li.bbp-forum-freshness, li.bbp-topic-freshness {
    width: 30%;
}
/* END -- Main Effect on Forum width on small devices */

#bbpress-forums ul[id*='forums-list-'] {
  padding: 0px !important;
  border: solid 0px red !important;
  margin-bottom: 2px;
}
#bbpress-forums ul[id*='forums-list-'] li.bbp-body ul[id*='bbp-forum-'] {
  	padding: 10px !important;
    border: solid 0px red !important;
  	margin-bottom: 2px;
}
#bbpress-forums ul[id*='bbp-forum-'] {
border-radius: 0px;
    -webkit-border-radius: 0px;
    -moz-border-radius: 0px;
    -ms-border-radius: 0px;
    -khtml-border-radius: 0px;
    -o-border-radius: 0px;
  	padding: 0px !important;
    border: solid 0px red !important;
  	margin-bottom: 2px;
}
#bbpress-forums ul[id*='bbp-topic-'].post-inner {
  border-radius: 0px 0px 0px 0px !important;
    -webkit-border-radius: 0px 0px 0px 0px !important;
    -moz-border-radius: 0px 0px 0px 0px !important;
    -ms-border-radius: 0px 0px 0px 0px !important;
    -khtml-border-radius: 0px 0px 0px 0px !important;
    -o-border-radius: 0px 0px 0px 0px !important;

}
#bbpress-forums ul[id*='bbp-topic-'] {
padding: 10px !important;
  margin-bottom: 2px;
  border: solid 0px red !important;
}

#bbpress-forums p.bbp-topic-meta img.avatar,
p.bbp-topic-meta span.bbp-topic-freshness-author a img.avatar {
  display: none;
}
	 

Kind Regards,