How to keep editing while saving?

Whenever my onClickSave function calls window.StripoApi.getTemplate() and window.StripoApi.compileEmail(), the Stripo plugin removes the current CKEditor. This prevents the user from continuing to type after hitting the Ctrl+S hotkey.

Here is my code to attempt a workaround of this, but it doesn't work:

    // Handle Ctrl+KeyS for Stripo iframe.
    React.useEffect(() => {
      if (!ready) return;
      /** @type {HTMLIFrameElement} */
      const iframe = document.getElementsByClassName("stripo-preview-frame")[0];
      if (!iframe) return;
      const doc = iframe.contentDocument;
      /** @param {KeyboardEvent} e */
      function handle(e) {
        if (e.ctrlKey && e.code === "KeyS") {
          e.preventDefault();
          const focusEl = doc.activeElement;
          onClickSave().then(() => {
            iframe.focus();
            // console.log("f", focusEl);  // <div class="esd-cke-text"></div>
            if (focusEl?.focus) {
              // The following never works because the input disappears on save...
              // focusEl.focus();
            }
          });
        }
      }
      doc.addEventListener("keydown", handle);
      return () => {
        doc.removeEventListener("keydown", handle);
      };
    }, [ready, onClickSave]);

Here's the full content of my save function which is called by the onClickSave function referenced in my code above:

      function save(template, data) {
        // setSaving(true);
        setReady(false);
        const { emailInfo, editorInfo, specInfo } = data;
        const email = { ...emailInfo };
        const editor = { ...editorInfo };
        const spec = { ...specInfo };
        return new Promise((resolve, _reject) => {
          window.StripoApi.getTemplate(function saveTemplate(
            emailEditHtml,
            emailEditCss,
            width,
            height,
          ) {
            email.height = height;
            email.width = width;
            const minimizeCompiledEmail = true;
            window.StripoApi.compileEmail(async function compileTemplate(
              error,
              emailHtml,
              emailAmp,
              // ampErrors,
            ) {
              if (error) {
                console.error("Error compiling email", error);
                await alertAsync({
                  title: "Error",
                  text:
                    "There was an error saving the email. " +
                    "Please try again or contact support.",
                });
                // setSaving(false);
                setReady(true);
                resolve(false);
                return;
              }
              let success = true;
              await saveEmailEdit(template, {
                email,
                emailHtml,
                emailAmp,
                emailEditHtml,
                emailEditCss,
                editor,
                spec,
              })
                .then(() => {
                  setChanged(false);
                })
                .catch(async error => {
                  console.error("Error saving email", error);
                  success = false;
                  await alertAsync({
                    title: "Error",
                    text:
                      "There was an error saving the email. " +
                      "Please try again or contact support.",
                  });
                });
              // console.log("Saved email", result);
              // setSaving(false);
              setReady(true);
              resolve(success);
            }, minimizeCompiledEmail);
          });
        });
      }