The contents of #4284 have been reverted

crates/eframe/src/native/glow_integration.rs

@@ -849,12 +849,14 @@ fn change_gl_context(
 ) {
     crate::profile_function!();
 
+    /*
     if let Some(current_gl_context) = current_gl_context {
         crate::profile_scope!("is_current");
         if gl_surface.is_current(current_gl_context) {
             return; // Early-out to save a lot of time.
         }
     }
+    */
 
     let not_current = {
         crate::profile_scope!("make_not_current");
@@ -1200,6 +1202,7 @@ impl GlutinWindowContext {
         if let Some(viewport) = self.viewports.get(&viewport_id) {
             if let Some(gl_surface) = &viewport.gl_surface {
                 change_gl_context(&mut self.current_gl_context, gl_surface);
+
                 gl_surface.resize(
                     self.current_gl_context
                         .as_ref()